Atomic strongmen, whose nuclear-powered muscles are capable of crushing tanks; super-speedsters, who move at nearly at the speed of thought, trailing streams of bio-electricity in their wakes; walking powder kegs whose fists strike with the force of a one kiloton bomb. All are examples of energy-infused characters: Human-or superhuman-individuals somehow bonded with some form of energy, their cells now burning with unnatural power, their muscles and nerves crackling with inhuman vigor.